function drawChartTreatmentsPerYear() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['2023', 424],
    ['2022', 738],
    ['2021', 1272],
    ['2020', 258],
    ['2019', 165],
    ['2018', 679],
    ['2017', 122],
    ['2016', 894],
    ['2015', 119],
    ['2014', 587],
    ['2013', 246],
    ['2007', 608],
    ['1972', 539],
    ['1956', 263],
    ['1753', 267],
    ['Other (75)', 539]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Year (n=7720)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerYear', 'pie', 16, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerYear'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerYear);